thumb|upright|Karmen Pedaru modeling for Michael Kors, Spring/Summer New York Fashion Week, 2013 A fashion week is a week-long fashion industry event where fashion designers, brands, or "houses" disp
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f68d4b0c897b62aae9bdcdc19cf614e8723bab7124ada1981f836e69c255c11. Chain 2 (Bitcoin): anchored in block 953947 (2026-06-16T13:14:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/235887cd-de80-4e87-98d4-5af0f37b4f8d.json and https://artists.proofprofile.net/proofs/artist/235887cd-de80-4e87-98d4-5af0f37b4f8d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).